That steering box is an aftermarket reproduction of the 84-87 Toyota steering box. It is sold by a variety of vendors and is also known as a 500 series. I have the original version of the Toyota box in my 56 which I installed in 2000. It has been trouble free. The box is close to the left rams horn manifold but clears ok. The later version moves the box closer inside the frame which may clear a big block. I have not seen one installed on a TF truck with a big block so I could only speculate as to the clearance. If you only have about 1" of clearance now it likely won't work.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine